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Wen H, Li Q, Mei S, Cai J, Huang X, Zhao J. A novel frameshift mutation in the NHS gene causes Nance-Horan syndrome in a Chinese family. Gene 2024; 907:148268. [PMID: 38350513 DOI: 10.1016/j.gene.2024.148268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 12/01/2023] [Accepted: 02/07/2024] [Indexed: 02/15/2024]
Affiliation(s)
- Huaming Wen
- Department of Ophthalmology, Chang'an Hospital of Dongguan, Dongguan 538240, Guangdong, China
| | - Qianwen Li
- Department of Oral & Maxillofacial Surgery, Shenzhen Stomatology Hospital, The Affiliated Shenzhen stomatology Hospital of Shenzhen University, Shenzhen 518000, Guangdong, China
| | - Shaoyi Mei
- Shenzhen Eye Hospital Affiliated to Jinan University, Shenzhen Eye Institute, Shenzhen 518040, Guangdong, China
| | - Jiamin Cai
- Shenzhen Eye Hospital Affiliated to Jinan University, Shenzhen Eye Institute, Shenzhen 518040, Guangdong, China
| | - Xiaosheng Huang
- Shenzhen Eye Hospital Affiliated to Jinan University, Shenzhen Eye Institute, Shenzhen 518040, Guangdong, China.
| | - Jun Zhao
- Department of Ophthalmology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzen 518020, Guangdong, China.
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2
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Guven Y, Saracoglu HP, Aksakal SD, Kalayci T, Altunoglu U, Uyguner ZO, Eraslan S, Borklu E, Kayserili H. Nance-Horan Syndrome: characterization of dental, clinical and molecular features in three new families. BMC Oral Health 2023; 23:314. [PMID: 37221585 DOI: 10.1186/s12903-023-03029-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 05/09/2023] [Indexed: 05/25/2023] Open
Abstract
BACKGROUND Nance-Horan syndrome (NHS; MIM 302,350) is an extremely rare X-linked dominant disease characterized by ocular and dental anomalies, intellectual disability, and facial dysmorphic features. CASE PRESENTATION We report on five affected males and three carrier females from three unrelated NHS families. In Family 1, index (P1) showing bilateral cataracts, iris heterochromia, microcornea, mild intellectual disability, and dental findings including Hutchinson incisors, supernumerary teeth, bud-shaped molars received clinical diagnosis of NHS and targeted NHS gene sequencing revealed a novel pathogenic variant, c.2416 C > T; p.(Gln806*). In Family 2, index (P2) presenting with global developmental delay, microphthalmia, cataracts, and ventricular septal defect underwent SNP array testing and a novel deletion encompassing 22 genes including the NHS gene was detected. In Family 3, two half-brothers (P3 and P4) and maternal uncle (P5) had congenital cataracts and mild to moderate intellectual deficiency. P3 also had autistic and psychobehavioral features. Dental findings included notched incisors, bud-shaped permanent molars, and supernumerary molars. Duo-WES analysis on half-brothers showed a hemizygous novel deletion, c.1867delC; p.(Gln623ArgfsTer26). CONCLUSIONS Dental professionals can be the first-line specialists involved in the diagnosis of NHS due to its distinct dental findings. Our findings broaden the spectrum of genetic etiopathogenesis associated with NHS and aim to raise awareness among dental professionals.
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Affiliation(s)
- Yeliz Guven
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Vezneciler, Istanbul, Turkey.
| | | | - Sermin Dicle Aksakal
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Vezneciler, Istanbul, Turkey
| | - Tugba Kalayci
- Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Umut Altunoglu
- Department of Medical Genetics, Koc University School of Medicine (KUSoM), Sarıyer, Istanbul, Turkey
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
| | - Zehra Oya Uyguner
- Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Serpil Eraslan
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
| | - Esra Borklu
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
| | - Hulya Kayserili
- Department of Medical Genetics, Koc University School of Medicine (KUSoM), Sarıyer, Istanbul, Turkey
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
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Dąbrowska J, Biedziak B, Bogdanowicz A, Mostowska A. Identification of Novel Risk Variants of Non-Syndromic Cleft Palate by Targeted Gene Panel Sequencing. J Clin Med 2023; 12:2051. [PMID: 36902838 PMCID: PMC10004578 DOI: 10.3390/jcm12052051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Non-syndromic cleft palate (ns-CP) has a genetically heterogeneous aetiology. Numerous studies have suggested a crucial role of rare coding variants in characterizing the unrevealed component of genetic variation in ns-CP called the "missing heritability". Therefore, this study aimed to detect low-frequency variants that are implicated in ns-CP aetiology in the Polish population. For this purpose, coding regions of 423 genes associated with orofacial cleft anomalies and/or involved with facial development were screened in 38 ns-CP patients using the next-generation sequencing technology. After multistage selection and prioritisation, eight novel and four known rare variants that may influence an individual's risk of ns-CP were identified. Among detected alternations, seven were located in novel candidate genes for ns-CP, including COL17A1 (c.2435-1G>A), DLG1 (c.1586G>C, p.Glu562Asp), NHS (c.568G>C, p.Val190Leu-de novo variant), NOTCH2 (c.1997A>G, p.Tyr666Cys), TBX18 (c.647A>T, p.His225Leu), VAX1 (c.400G>A, p.Ala134Thr) and WNT5B (c.716G>T, p.Arg239Leu). The remaining risk variants were identified within genes previously linked to ns-CP, confirming their contribution to this anomaly. This list included ARHGAP29 (c.1706G>A, p.Arg569Gln), FLNB (c.3605A>G, Tyr1202Cys), IRF6 (224A>G, p.Asp75Gly-de novo variant), LRP6 (c.481C>A, p.Pro161Thr) and TP63 (c.353A>T, p.Asn118Ile). In summary, this study provides further insights into the genetic components contributing to ns-CP aetiology and identifies novel susceptibility genes for this craniofacial anomaly.
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Affiliation(s)
- Justyna Dąbrowska
- Department of Biochemistry and Molecular Biology, Poznan University of Medical Sciences, 6 Swiecickiego Street, 60-781 Poznan, Poland
| | - Barbara Biedziak
- Department of Orthodontics and Craniofacial Anomalies, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Agnieszka Bogdanowicz
- Department of Orthodontics and Craniofacial Anomalies, Poznan University of Medical Sciences, 60-812 Poznan, Poland
| | - Adrianna Mostowska
- Department of Biochemistry and Molecular Biology, Poznan University of Medical Sciences, 6 Swiecickiego Street, 60-781 Poznan, Poland
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Damián A, Ionescu RO, Rodríguez de Alba M, Tamayo A, Trujillo-Tiebas MJ, Cotarelo-Pérez MC, Pérez Rodríguez O, Villaverde C, de la Fuente L, Romero R, Núñez-Moreno G, Mínguez P, Ayuso C, Cortón M. Fine Breakpoint Mapping by Genome Sequencing Reveals the First Large X Inversion Disrupting the NHS Gene in a Patient with Syndromic Cataracts. Int J Mol Sci 2021; 22:ijms222312713. [PMID: 34884523 PMCID: PMC8657747 DOI: 10.3390/ijms222312713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022] Open
Abstract
Inversions are structural variants that are generally balanced. However, they could lead to gene disruptions or have positional effects leading to diseases. Mutations in the NHS gene cause Nance-Horan syndrome, an X-linked disorder characterised by congenital cataracts and dental anomalies. Here, we aimed to characterise a balanced pericentric inversion X(p22q27), maternally inherited, in a child with syndromic bilateral cataracts by breakpoint mapping using whole-genome sequencing (WGS). 30× Illumina paired-end WGS was performed in the proband, and breakpoints were confirmed by Sanger sequencing. EdU assays and FISH analysis were used to assess skewed X-inactivation patterns. RNA expression of involved genes in the breakpoint boundaries was evaluated by droplet-digital PCR. We defined the breakpoint position of the inversion at Xp22.13, with a 15 bp deletion, disrupting the unusually large intron 1 of the canonical NHS isoform, and also perturbing topologically-associated domains (TADs). Moreover, a microhomology region of 5 bp was found on both sides. RNA analysis confirmed null and reduced NHS expression in the proband and his unaffected mother, respectively. In conclusion, we report the first chromosomal inversion disrupting NHS, fine-mapped by WGS. Our data expand the clinical spectrum and the pathogenic mechanisms underlying the NHS defects.
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Affiliation(s)
- Alejandra Damián
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - Raluca Oancea Ionescu
- Department of Medical Genetics, University Hospital Clínico San Carlos, 28040 Madrid, Spain; (R.O.I.); (M.C.C.P.)
| | - Marta Rodríguez de Alba
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - Alejandra Tamayo
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - María José Trujillo-Tiebas
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - María Carmen Cotarelo-Pérez
- Department of Medical Genetics, University Hospital Clínico San Carlos, 28040 Madrid, Spain; (R.O.I.); (M.C.C.P.)
| | - Olga Pérez Rodríguez
- Department of Pediatrics, University Hospital Clínico San Carlos, 28040 Madrid, Spain;
| | - Cristina Villaverde
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - Lorena de la Fuente
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
- Bioinformatics Unit, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040, Madrid, Spain
| | - Raquel Romero
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - Gonzalo Núñez-Moreno
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Bioinformatics Unit, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040, Madrid, Spain
| | - Pablo Mínguez
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
- Bioinformatics Unit, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040, Madrid, Spain
| | - Carmen Ayuso
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
| | - Marta Cortón
- Department of Genetics & Genomics, Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), 28040 Madrid, Spain; (A.D.); (M.R.d.A.); (A.T.); (M.J.T.-T); (C.V.); (L.d.l.F.); (R.R.); (G.N.-M); (P.M.); (C.A.)
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), 28290 Madrid, Spain
- Correspondence:
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Prominent and Regressive Brain Developmental Disorders Associated with Nance-Horan Syndrome. Brain Sci 2021; 11:brainsci11091150. [PMID: 34573171 PMCID: PMC8465299 DOI: 10.3390/brainsci11091150] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/17/2022] Open
Abstract
Nance-Horan syndrome (NHS) is a rare X-linked developmental disorder caused mainly by loss of function variants in the NHS gene. NHS is characterized by congenital cataracts, dental anomalies, and distinctive facial features, and a proportion of the affected individuals also present intellectual disability and congenital cardiopathies. Despite identification of at least 40 distinct hemizygous variants leading to NHS, genotype-phenotype correlations remain largely elusive. In this study, we describe a Sicilian family affected with congenital cataracts and dental anomalies and diagnosed with NHS by whole-exome sequencing (WES). The affected boy from this family presented a late regression of cognitive, motor, language, and adaptive skills, as well as broad behavioral anomalies. Furthermore, brain imaging showed corpus callosum anomalies and periventricular leukoencephalopathy. We expand the phenotypic and mutational NHS spectrum and review potential disease mechanisms underlying the central neurological anomalies and the potential neurodevelopmental features associated with NHS.
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A novel small deletion in the NHS gene associated with Nance-Horan syndrome. Sci Rep 2018; 8:2398. [PMID: 29402928 PMCID: PMC5799206 DOI: 10.1038/s41598-018-20787-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/24/2018] [Indexed: 11/29/2022] Open
Abstract
Nance-Horan syndrome is a rare X-linked recessive inherited disease with clinical features including severe bilateral congenital cataracts, characteristic facial and dental abnormalities. Data from Chinese Nance-Horan syndrome patients are limited. We assessed the clinical manifestations of a Chinese Nance-Horan syndrome pedigree and identified the genetic defect. Genetic analysis showed that 3 affected males carried a novel small deletion in NHS gene, c.263_266delCGTC (p.Ala89TrpfsTer106), and 2 female carriers were heterozygous for the same variant. All 3 affected males presented with typical Nance-Horan syndrome features. One female carrier displayed lens opacities centered on the posterior Y-suture in both eyes, as well as mild dental abnormalities. We recorded the clinical features of a Chinese Nance-Horan syndrome family and broadened the spectrum of mutations in the NHS gene.
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Gómez-Laguna L, Martínez-Herrera A, Reyes-de la Rosa ADP, García-Delgado C, Nieto-Martínez K, Fernández-Ramírez F, Valderrama-Atayupanqui TY, Morales-Jiménez AB, Villa-Morales J, Kofman S, Cervantes A, Morán-Barroso VF. Nance-Horan syndrome in females due to a balanced X;1 translocation that disrupts the NHS gene: Familial case report and review of the literature. Ophthalmic Genet 2017; 39:56-62. [PMID: 28922055 DOI: 10.1080/13816810.2017.1363245] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The Nance-Horan syndrome is an X-linked disorder characterized by congenital cataract, facial features, microcornea, microphthalmia, and dental anomalies; most of the cases are due to NHS gene mutations on Xp22.13. Heterozygous carrier females generally present less severe features, and up to 30% of the affected males have intellectual disability. We describe two patients, mother and daughter, manifesting Nance-Horan syndrome. The cytogenetic and molecular analyses demonstrated a 46,X,t(X;1)(p22.13;q22) karyotype in each of them. No copy-number genomic imbalances were detected by high-density microarray analysis. The mother had a preferential inactivation of the normal X chromosome; expression analysis did not detect any mRNA isoform of NHS. This is the first report of Nance-Horan syndrome due to a skewed X chromosome inactivation resulting from a balanced translocation t(X;1) that disrupts the NHS gene expression, with important implications for clinical presentation and genetic counseling.
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Affiliation(s)
- Laura Gómez-Laguna
- a Service of Genetics , Hospital General de México Dr. Eduardo Liceaga , Mexico City , Mexico
| | | | | | | | - Karem Nieto-Martínez
- b Faculty of Medicine , Universidad Nacional Autónoma de México (UNAM) , Mexico City , Mexico
| | | | | | | | - Judith Villa-Morales
- c Department of Genetics , Hospital Infantil de México Federico Gómez , Mexico City , Mexico
| | - Susana Kofman
- a Service of Genetics , Hospital General de México Dr. Eduardo Liceaga , Mexico City , Mexico
| | - Alicia Cervantes
- a Service of Genetics , Hospital General de México Dr. Eduardo Liceaga , Mexico City , Mexico.,b Faculty of Medicine , Universidad Nacional Autónoma de México (UNAM) , Mexico City , Mexico
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Shoshany N, Avni I, Morad Y, Weiner C, Einan-Lifshitz A, Pras E. NHS Gene Mutations in Ashkenazi Jewish Families with Nance-Horan Syndrome. Curr Eye Res 2017; 42:1240-1244. [PMID: 28557584 DOI: 10.1080/02713683.2017.1304560] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE To describe ocular and extraocular abnormalities in two Ashkenazi Jewish families with infantile cataract and X-linked inheritance, and to identify their underlying mutations. METHODS Seven affected members were recruited. Medical history, clinical findings, and biometric measurements were recorded. Mutation analysis of the Nance-Horan syndrome (NHS) gene was performed by direct sequencing of polymerase chain reaction-amplified exons. RESULTS An unusual anterior Y-sutural cataract was documented in the affected male proband. Other clinical features among examined patients included microcorneas, long and narrow faces, and current or previous dental anomalies. A nonsense mutation was identified in each family, including a previously described 742 C>T, p.(Arg248*) mutation in Family A, and a novel mutation 2915 C>A, p.(Ser972*) in Family B. CONCLUSIONS Our study expands the repertoire of NHS mutations and the related phenotype, including newly described anterior Y-sutural cataract and dental findings.
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Affiliation(s)
- Nadav Shoshany
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel.,b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel
| | - Isaac Avni
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel.,b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Yair Morad
- b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Chen Weiner
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel
| | - Adi Einan-Lifshitz
- b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Eran Pras
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel.,b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
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Accogli A, Traverso M, Madia F, Bellini T, Vari MS, Pinto F, Capra V. A novel Xp22.13 microdeletion in Nance-Horan syndrome. Birth Defects Res 2017; 109:866-868. [PMID: 28464487 DOI: 10.1002/bdr2.1032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 02/25/2017] [Accepted: 03/01/2017] [Indexed: 11/06/2022]
Abstract
BACKGROUND Nance-Horan syndrome (NHS) is a rare X-linked developmental disorder characterized by congenital cataract, dental anomalies and facial dysmorphisms. Notably, up to 30% of NHS patients have intellectual disability and a few patients have been reported to have congenital cardiac defects. Nance-Horan syndrome is caused by mutations in the NHS gene that is highly expressed in the midbrain, retina, lens, tooth, and is conserved across vertebrate species. Although most pathogenic mutations are nonsense mutations, a few genomic rearrangements involving NHS locus have been reported, suggesting a possible pathogenic role of the flanking genes. METHODS Here, we report a microdeletion of 170,6 Kb at Xp22.13 (17.733.948-17.904.576) (GRCh37/hg19), detected by array-based comparative genomic hybridization in an Italian boy with NHS syndrome. RESULTS The microdeletion harbors the NHS, SCLML1, and RAI2 genes and results in a phenotype consistent with NSH syndrome and developmental delay. CONCLUSION We compare our case with the previous Xp22.13 microdeletions and discuss the possible pathogenetic role of the flanking genes. Birth Defects Research 109:866-868, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Andrea Accogli
- Istituto G. Gaslini, Genova, Italy.,Università degli Studi di Genova, Italy
| | - Monica Traverso
- Istituto G. Gaslini, Genova, Italy.,Università degli Studi di Genova, Italy
| | | | - Tommaso Bellini
- Istituto G. Gaslini, Genova, Italy.,Università degli Studi di Genova, Italy
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Gjørup H, Haubek D, Jacobsen P, Ostergaard JR. Nance-Horan syndrome-The oral perspective on a rare disease. Am J Med Genet A 2016; 173:88-98. [PMID: 27616609 DOI: 10.1002/ajmg.a.37963] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/21/2016] [Indexed: 11/11/2022]
Abstract
The present study describes seven patients with Nance-Horan syndrome, all referred to a specialized oral care unit in the Central Denmark Region. A literature search on "Nance Horan Syndrome" resulted in 53 publications among which 29 reported on dental findings. Findings reported in these papers have been systematized to obtain an overview of the reported findings and the terminology on dental morphology. All seven patients included in the present study showed deviations of crown morphology on incisors and/or molars. The only consistent and very clear dental aberration was alterations in the tooth morphology that is screwdriver-shaped incisors and bud molars being most pronounced in the permanent dentition, but were also present in the primary dentition. In addition, three patients had supernumerary teeth, and three had dental agenesis. In conclusion, a dental examination as a part of the diagnostic process may reveal distinct characteristics of the dental morphology, which could be of diagnostic value and facilitate an early diagnosis. In the description of molar morphology in NHS patients, it is recommended to use the term "bud molar." The combination of congenital cataract, screwdriwer-shaped incisors and bud-shaped molars is a strong clinical indication of Nance-Horan syndrome. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hans Gjørup
- Section of Oral Health in Rare Diseases, Department of Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Dorte Haubek
- Section for Pediatric Dentistry, Department of Dentistry, Health, Aarhus University, Aarhus, Denmark
| | - Pernille Jacobsen
- Department of Specialized Oral Health Care, Viborg Regional Hospital, Central Jutland, Viborg, Denmark
| | - John R Ostergaard
- Center for Rare Diseases, Department of Pediatrics, Aarhus University Hospital, Aarhus, Denmark
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Li A, Li B, Wu L, Yang L, Chen N, Ma Z. Identification of a novel NHS mutation in a Chinese family with Nance-Horan syndrome. Curr Eye Res 2014; 40:434-8. [PMID: 25266737 DOI: 10.3109/02713683.2014.959606] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To identiy the disease causing mutation in a Chinese family presenting with early-onset cataract and dental anomalies. MATERIALS AND METHODS A specific Hereditary Eye Disease Enrichment Panel (HEDEP) (personalized customization by MyGenostics, Baltimore, MD) based on targeted exome capture technology was used to collect the protein coding regions of 30 early-onset cataract associated genes, and high throughput sequencing was done with Illumina HiSeq 2000 platform. The identified variant was confirmed with Sanger sequencing. RESULTS A novel deletion in exon 4 (c.852delG) of NHS gene was identified; the identified 1 bp deletion altered the reading frame and was predicted to result in a premature stop codon after the addition of twelve novel amino acid (p.S285PfsX13). This mutation co-segregated in affected males and obligate female carriers, but was absent in 100 matched controls. CONCLUSIONS Our findings broaden the spectrum of NHS mutations causing Nance-Horan syndrome and phenotypic spectrum of the disease in Chinese patients.
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Affiliation(s)
- Aijun Li
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Peking University Eye Center, Peking University Third Hospital , Beijing , P. R. China
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Hong N, Chen YH, Xie C, Xu BS, Huang H, Li X, Yang YQ, Huang YP, Deng JL, Qi M, Gu YS. Identification of a novel mutation in a Chinese family with Nance-Horan syndrome by whole exome sequencing. J Zhejiang Univ Sci B 2014; 15:727-34. [PMID: 25091991 DOI: 10.1631/jzus.b1300321] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Nance-Horan syndrome (NHS) is a rare X-linked disorder characterized by congenital nuclear cataracts, dental anomalies, and craniofacial dysmorphisms. Mental retardation was present in about 30% of the reported cases. The purpose of this study was to investigate the genetic and clinical features of NHS in a Chinese family. METHODS Whole exome sequencing analysis was performed on DNA from an affected male to scan for candidate mutations on the X-chromosome. Sanger sequencing was used to verify these candidate mutations in the whole family. Clinical and ophthalmological examinations were performed on all members of the family. RESULTS A combination of exome sequencing and Sanger sequencing revealed a nonsense mutation c.322G>T (E108X) in exon 1 of NHS gene, co-segregating with the disease in the family. The nonsense mutation led to the conversion of glutamic acid to a stop codon (E108X), resulting in truncation of the NHS protein. Multiple sequence alignments showed that codon 108, where the mutation (c.322G>T) occurred, was located within a phylogenetically conserved region. The clinical features in all affected males and female carriers are described in detail. CONCLUSIONS We report a nonsense mutation c.322G>T (E108X) in a Chinese family with NHS. Our findings broaden the spectrum of NHS mutations and provide molecular insight into future NHS clinical genetic diagnosis.
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Affiliation(s)
- Nan Hong
- Department of Ophthalmology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China; Beijing Genomics Institute (BGI)-Shenzhen, Shenzhen 518083, China; School of Basic Medical Sciences, Zhejiang University, Hangzhou 310058, China; Functional Genomics Center, Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, West Henrietta, NY 14586, USA
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Aldahmesh MA, Khan AO, Mohamed JY, Hijazi H, Al-Owain M, Alswaid A, Alkuraya FS. Genomic analysis of pediatric cataract in Saudi Arabia reveals novel candidate disease genes. Genet Med 2012; 14:955-62. [PMID: 22935719 DOI: 10.1038/gim.2012.86] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Pediatric cataract is an important preventable blinding disease. Previous studies have estimated 10-25% of cases to be genetic in etiology. METHODS In an effort to characterize the genetics of cataract in our population, we have conducted a comprehensive clinical and genomic analysis (including autozygome and exome analysis) on a series of 38 index patients. RESULTS Pediatric cataract is genetic in at least 79% of the study families. Although crystallins accounted for most of the mutant alleles, mutations in other genes were encountered, including recessive mutations in genes that usually cause the disease in a dominant manner. In addition, several novel candidate genes (MFSD6L, AKR1E2, RNLS, and CYP51A1) were identified. CONCLUSION Pediatric cataract is typically a genetic disease, usually autosomal recessive, in Saudi Arabia. Although defining a specific cataract phenotype can sometimes predict the genetic cause, genomic analysis is often required to unravel the causative mutation given the marked genetic heterogeneity. The identified novel candidate genes require independent confirmation in future studies.
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Affiliation(s)
- Mohammed A Aldahmesh
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
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